<template>
  <div>
    <span>全选:</span>
    <input type="checkbox" v-model="liamy" />
    <button @click="fxFn">反选</button>
    <ul>
      <li v-for="(obj, index) in arr" :key="index">
        <input type="checkbox" v-model="obj.checked" />
        <span>{{ obj.name }}</span>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [
        {
          name: "猪八戒",
          checked: false,
        },
        {
          name: "孙悟空",
          checked: false,
        },
        {
          name: "唐僧",
          checked: false,
        },
        {
          name: "白龙马",
          checked: false,
        },
      ],
    };
  },
  computed: {
    liamy: {
      set(ab) {
        this.arr.forEach((obj) => {
          obj.checked = ab;
        });
      },
      get() {
        return this.arr.every((obj) => obj.checked);
      },
    },
  },
  methods: {
    fxFn() {
      this.arr.forEach((obj) => (obj.checked = !obj.checked));
    },
  },
};
</script>

<style>
</style>